Hearing aid



FIG. 1 is a front, top, and right side perspective view of a hearing aidshowing my new design;

FIG. 2 is a rear, bottom, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a left side elevational view thereof.

The broken lines immediately adjacent the shaded areas represent thebounds of the claim, while all other broken lines are directed toenvironment; the broken lines form no part of the claimed design.

CLAIM The ornamental design for a hearing aid, as shown and described.